arXiv (Cornell University)最新文献_第6页

Robust magnetic proximity induced anomalous Hall effect in a room temperature van der Waals ferromagnetic semiconductor based 2D heterostructure 室温范德华铁磁半导体二维异质结构中鲁棒磁邻近诱导的反常霍尔效应

arXiv (Cornell University) Pub Date : 2023-11-13 DOI: 10.48550/arxiv.2311.07183

Wu, Hao, Yang, Li, Zhang, Gaojie, Jin, Wen, Xiao, Bichen, Zhang, Wenfeng, Chang, Haixin

{"title":"Robust magnetic proximity induced anomalous Hall effect in a room\u0000 temperature van der Waals ferromagnetic semiconductor based 2D\u0000 heterostructure","authors":"Wu, Hao, Yang, Li, Zhang, Gaojie, Jin, Wen, Xiao, Bichen, Zhang, Wenfeng, Chang, Haixin","doi":"10.48550/arxiv.2311.07183","DOIUrl":"https://doi.org/10.48550/arxiv.2311.07183","url":null,"abstract":"Developing novel high-temperature van der Waals ferromagnetic semiconductor materials and investigating their interface coupling effects with two-dimensional topological semimetals are pivotal for advancing next-generation spintronic and quantum devices. However, most van der Waals ferromagnetic semiconductors exhibit ferromagnetism only at low temperatures, limiting the proximity research on their interfaces with topological semimetals. Here, we report an intrinsic, van der Waals layered room-temperature ferromagnetic semiconductor crystal, FeCr0.5Ga1.5Se4 (FCGS), with a Curie temperature as high as 370 K, setting a new record for van der Waals ferromagnetic semiconductors. The saturation magnetization at low temperature (2 K) and room temperature (300 K) reaches 8.2 emu/g and 2.7 emu/g, respectively. Furthermore, FCGS possesses a bandgap of approximately 1.2 eV, which is comparable to the widely used commercial silicon. The FCGS/graphene heterostructure exhibits an impeccably smooth and gapless interface, thereby inducing a robust magnetic proximity coupling effect between FCGS and graphene. After the proximity coupling, graphene undergoes a charge carrier transition from electrons to holes, accompanied by a transition from non-magnetic to ferromagnetic transport behavior with robust anomalous Hall effect. Notably, the anomalous Hall effect remains robust even temperatures up to 400 K.","PeriodicalId":496270,"journal":{"name":"arXiv (Cornell University)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136353289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Birkhoff attractors of dissipative billiards 耗散台球的Birkhoff吸引子

arXiv (Cornell University) Pub Date : 2023-11-13 DOI: 10.48550/arxiv.2311.07342

Bernardi, Olga, Florio, Anna, Leguil, Martin

引用次数: 0

Bridging the Sim-to-Real Gap with Dynamic Compliance Tuning for Industrial Insertion 用工业插入的动态顺应调整弥合模拟与真实的差距

arXiv (Cornell University) Pub Date : 2023-11-13 DOI: 10.48550/arxiv.2311.07499

Zhang, Xiang, Tomizuka, Masayoshi, Li, Hui

{"title":"Bridging the Sim-to-Real Gap with Dynamic Compliance Tuning for\u0000 Industrial Insertion","authors":"Zhang, Xiang, Tomizuka, Masayoshi, Li, Hui","doi":"10.48550/arxiv.2311.07499","DOIUrl":"https://doi.org/10.48550/arxiv.2311.07499","url":null,"abstract":"Contact-rich manipulation tasks often exhibit a large sim-to-real gap. For instance, industrial assembly tasks frequently involve tight insertions where the clearance is less than (0.1) mm and can even be negative when dealing with a deformable receptacle. This narrow clearance leads to complex contact dynamics that are difficult to model accurately in simulation, making it challenging to transfer simulation-learned policies to real-world robots. In this paper, we propose a novel framework for robustly learning manipulation skills for real-world tasks using only the simulated data. Our framework consists of two main components: the ``Force Planner'' and the ``Gain Tuner''. The Force Planner is responsible for planning both the robot motion and desired contact forces, while the Gain Tuner dynamically adjusts the compliance control gains to accurately track the desired contact forces during task execution. The key insight of this work is that by adaptively adjusting the robot's compliance control gains during task execution, we can modulate contact forces in the new environment, thereby generating trajectories similar to those trained in simulation and narrows the sim-to-real gap. Experimental results show that our method, trained in simulation on a generic square peg-and-hole task, can generalize to a variety of real-world insertion tasks involving narrow or even negative clearances, all without requiring any fine-tuning.","PeriodicalId":496270,"journal":{"name":"arXiv (Cornell University)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136353313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multilingual Nonce Dependency Treebanks: Understanding how LLMs represent and process syntactic structure 多语言Nonce依赖树库:理解llm如何表示和处理语法结构

arXiv (Cornell University) Pub Date : 2023-11-13 DOI: 10.48550/arxiv.2311.07497

Arps, David, Kallmeyer, Laura, Samih, Younes, Sajjad, Hassan

引用次数: 0

Learning Symmetrization for Equivariance with Orbit Distance Minimization 基于轨道距离最小化的等距对称学习

arXiv (Cornell University) Pub Date : 2023-11-13 DOI: 10.48550/arxiv.2311.07143

Nguyen, Tien Dat, Kim, Jinwoo, Yang, Hongseok, Hong, Seunghoon

引用次数: 0

Membrane Models as a Means of Propulsion in General Relativity: Super-Luminal Warp-Drive that Satisfies the Weak Energy Condition 膜模型作为广义相对论中的一种推进手段:满足弱能量条件的超光速翘曲驱动

arXiv (Cornell University) Pub Date : 2023-11-13 DOI: 10.48550/arxiv.2311.07193

Huey, Greg

引用次数: 0

Hype in Science Communication: Exploring Scientists' Attitudes and Practices in Quantum Physics 科学传播中的炒作:探索科学家在量子物理学中的态度和实践

arXiv (Cornell University) Pub Date : 2023-11-13 DOI: 10.48550/arxiv.2311.07160

Soto-Sanfiel, María T., Chong, Chin-Wen, Latorre, José I.

{"title":"Hype in Science Communication: Exploring Scientists' Attitudes and\u0000 Practices in Quantum Physics","authors":"Soto-Sanfiel, María T., Chong, Chin-Wen, Latorre, José I.","doi":"10.48550/arxiv.2311.07160","DOIUrl":"https://doi.org/10.48550/arxiv.2311.07160","url":null,"abstract":"An interpretive phenomenological approach is adopted to investigate scientists' attitudes and practices related to hype in science communication. Twenty-four active quantum physicists participated in 5 focus groups. Through a semi-structured questionnaire, their use of hype, attitudes, behaviours, and perspectives on hype in science communication were observed. The main results show that scientists primarily attribute hype generation to themselves, major corporations, and marketing departments. They see hype as crucial for research funding and use it strategically, despite concerns. Scientists view hype as coercive, compromising their work's integrity, leading to mostly negative feelings about it, except for collaborator-generated hype. A dissonance exists between scientists' involvement in hype, their opinions, and the negative emotions it triggers. They manage this by attributing responsibility to the academic system, downplaying their practices. This reveals hype in science communication as a calculated, persuasive tactic by academic stakeholders, aligning with a neoliberal view of science. Implications extend to science communication, media studies, regulation, and academia.","PeriodicalId":496270,"journal":{"name":"arXiv (Cornell University)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136353449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CycleGANAS: Differentiable Neural Architecture Search for CycleGAN CycleGANAS: CycleGAN的可微神经结构搜索

arXiv (Cornell University) Pub Date : 2023-11-13 DOI: 10.48550/arxiv.2311.07162

An, Taegun, Joo, Changhee

引用次数: 0

Developing a Named Entity Recognition Dataset for Tagalog 为他加禄语开发一个命名实体识别数据集

arXiv (Cornell University) Pub Date : 2023-11-13 DOI: 10.48550/arxiv.2311.07161

Miranda, Lester James V.

引用次数: 0

On the mathematical replication of the MacKay effect from redundant stimulation 冗余刺激下麦凯效应的数学复制

arXiv (Cornell University) Pub Date : 2023-11-13 DOI: 10.48550/arxiv.2311.07338

Tamekue, Cyprien, Prandi, Dario, Chitour, Yacine

{"title":"On the mathematical replication of the MacKay effect from redundant\u0000 stimulation","authors":"Tamekue, Cyprien, Prandi, Dario, Chitour, Yacine","doi":"10.48550/arxiv.2311.07338","DOIUrl":"https://doi.org/10.48550/arxiv.2311.07338","url":null,"abstract":"In this study, we investigate the intricate connection between visual perception and the mathematical modelling of neural activity in the primary visual cortex (V1), focusing on replicating the MacKay effect [Mackay, Nature 1957]. While bifurcation theory has been a prominent mathematical approach for addressing issues in neuroscience, especially in describing spontaneous pattern formations in V1 due to parameter changes, it faces challenges in scenarios with localised sensory inputs. This is evident, for instance, in Mackay's psychophysical experiments, where the redundancy of visual stimuli information results in irregular shapes, making bifurcation theory and multi-scale analysis less effective. To address this, we follow a mathematical viewpoint based on the input-output controllability of an Amari-type neural fields model. This framework views the sensory input as a control function, cortical representation via the retino-cortical map of the visual stimulus that captures the distinct features of the stimulus, specifically the central redundancy in MacKay's funnel pattern ``MacKay rays''. From a control theory point of view, the exact controllability property of the Amari-type equation is discussed both for linear and nonlinear response functions. Then, applied to the MacKay effect replication, we adjust the parameter representing intra-neuron connectivity to ensure that, in the absence of sensory input, cortical activity exponentially stabilises to the stationary state that we perform quantitative and qualitative studies to show that it captures all the essential features of the induced after-image reported by MacKay","PeriodicalId":496270,"journal":{"name":"arXiv (Cornell University)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136353460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0